Emergency stop or brake for elevators.



N0. 660,85l. Patented 06f. 30, |900.

I I. FBANKEL.

EMERGENCY STO? 0R BRAKE FOB ELEVATURS.

(Application filed Aug. 1, 1900.)

(No Model.)

)iD-b I i jy@ /3 (an, w.

l UNITED STATES PATENT OFFICE.

ISAAC FRANKEL, OF PITTSBURG, PENNSYLVANIA.

EMERGENCY STOP OR BRAKE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 660,851, dated October 30, 1900.

Application filed August 1,. 1900, Serial No. 25,527. (No model.)

ing had tothe accompanying drawings, whichv form a part of this specification.

This invention relates to an improved emerl gency stop or brake for elevator-cars; and it consists in certain details of construction and combination of parts,as will be fully described and claimed hereinafter.

In the accompanying drawings, Figure l is a rear elevation of a portion of au elevator 1 shaft and car, showing my improved safety stop or brake arranged in connection therewith, the same being constructed and arranged in accordance `with my invention. Fig. 2 is an end sectional .elevation of the same, taken on the line 2 2 of Fig. l. Fig. 3 is a sectional view on the line 3 3 of Fig. 4, showing the arrangement of the guide-pulleys used in connection with the device. Fig. 4 is an enlarged detailed front View of one of the safety-checks of shoes, together with a portion of its connected mechanism. Fig. 5 is an enlarged perspective view of one of the checks of shoes, showing a portion of the bar upon which the same is hinged.

To put my invention into practice, and thereby provide a safety device for elevators, I attach beneath the door l of the elevatorcar 2 a bar 3, the ends of which terminate opposite and a short distance away from the slides or guides 4, on which the said car trav' els up and down the shaft. Hinged to each end of this bar 3 are stout metal blocks or shoes 5, each formed with a slot or groove 6 to engage with the guides4 and each having an upwardly-projecting arm 6', by means of which the said shoes are hinged to the bar 3. Each of these shoes 5 isprovided with a staple 7, to which cords or ropes 8 and 8 are connected, and the said cords or ropes are ar-y ranged over pulleys 9 and 9 and attached to a drum 10, located inside of the elevator-car 2. This drum l0 is mounted upon a shaft ll, arranged in suitablel bearings and Within easy reach of the operator, and the said drum is fitted with a hand-wheel l2 and a ratchetwheel and pawl 13 to keep the shoes 5 in a certain position and prevent the spring 14 from drawing the shoes any farther away from the slides 4. These two shoes 5 are connected the one with the other by a spring 14, which tends to draw the said shoes away from the slides 4.

In operation should rope or machinery operating the car 2 break or become inoperative and fail to suspend the car or elevate or lower the car properly the operator by simply giving the hand-wheel l2 a quick turn or partial revolution on its axis a tension is placed upon the ropes or cords 8 and 8 to slightly wind them about the drum 10. This movement of the drum 10 will elevate the shoes 5 into contact with the slides 4 and by reason of their eccentric movement will bind or jam themselves against the said slides and aided by the weightof the car and its occupants, will create a frictional contact that will bring the car to a dead-stop.

Various slight modifications and changes may be made in the details of construction without departing from the spirit of the invention. Therefore I d o not confine myself to the exact construction shown and described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

In combination with an elevator-car, the shoes 5 hinged beneath the Hoor of the said car, a spring l4 connecting the said shoes together, the tension of which will keep the same from contact with the slides 4, ropes or cords attached to the shoes, adrum arranged within the elevator-car to which said cords or ropes are connected, means for operating the said drum whereby the said shoes may be elevated into contact with the slides, `or held stationary away from the same, all arranged and combined for service,'substantially as and for the purpose described.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

ISAAC FRANKEL. 

